Tool



July 23, 1940. c. J. Bmg-:FER 2,209,186

TOOL

Original Filed June 8, 1935 Y 315% #mahnung @WWII Y INVENTOR. 56 @f5/y@ J wf/fie ATTORNEY.

Patented July 23, 1940 TOOL Caesar J. Briefer, Brooklyn, NLY;

Original application June 8, Y21935, Serial No. 25,592. Divided and this application April 30, 1936, Serial No. 77,0791/ 4 Claims.

This invention relates to tools by which incandescent lamps may be readily manufactured with, a reflecting surface upon a portion of the interior of the bulb.

'I'his application is a division of my co-pending application Serial #25,592, filed June y8, 1935.

The invention accordingly comprises an article of manufacture possessing ,the features, properv ties, and the relation of elements which will be exemplified in the article hereinafter described and the scope of the application of which will be indicated in the claims.

For a fuller understanding of the nature and objects of the invention,lreference should be had to the following detailed description, taken in connection with the accompanying drawing, in which:

Figure 1 is a sectional View of a tool embodying this invention for the manufacture of lamps having the outer end of the bulb uncoated.

Figure 2 is a section on the line 2--2 of Figure 1.

Figure 3 is a sectional view of a tool used in the making of lampsiwith the base of the bulb uncoated. l

Figure 4 is a section on the line 4 4 of Figure 3,.

In accordance with this invention, the most practical way of coating a portion of the surface of a glass bulb intended for the manufacture of incandescent lamps is to .apply the coating to a greater portion of the bulb than that desired for a reflecting surface and then to remove the excess by a special tool that can be inserted within the bulb.

In the form illustrated in Figure l, there `is shown a step in the manufacture of a bulb having the base portion of the bulb alone coated. The bulbhere is designated by the numeral IIl, having a bulb portion Il, and step portion I2.

At this step in the proceedings, the bulb has already been coated with this transparent reflecting coating therein designated by the numeral I3 and the function of this step in the proceedings is the removal of the coating throughout the outer or extreme end of the bulb.

Referring now to Figures 1, 2, 3, and 4, the numeral I5 designates a shaft adapted to be connected to and driven by any suitable source of power, for example an electric motor I5. This shaft carries in its intermediate portion a collar I1 and at its end a second collar I8, which collars are pinned to the shaft by pins I9 and 2l] respectively. A sleeve 2| is journaled upon the collars to permit the shaft I5 and the collars to rotatewithinV thesleeve and to permit the sleeve to move longitudinally upon the shaft.\

To effect this longitudinal movement of the sleeve, there is provided upon the sleeve 2l a bracket onv which is pivoted at 23 a bifurcated lever 24 carrying pins 25 to engage a circumferential groove 26 in the block.

The collar I8 extends beyond the end of the shaft I5y and at its own end it is provided with circumferentially spaced radial slots 21 in which are pivoted at 28 lingersV 29.

Within the bore 30 in the collar I8 and beyond the end of the shaft I5 is provided a spring 3l bearing outwardly upon a block 32. This block 32 and the back surface 33 of the fingers 29 are so arranged that the pressure of the spring 3| is exerted out of alignment with the pivots 28 to urge the fingers to fly outwardly about their pivots. This outer movement of the fingers, however, is controlled by the end of the sleeve 2| which` in its outer position engages a cam surface 34 upon the ngers to press them together.

Eachof theflnge-rs 29 preferably comprises a block 35. pivot-ed at 28 as previously described and having an internal bore 36 in which is slidingly mounted a brush holder 31 urged outwardly by a spring38 and restrained in its outward position by a pin 39, This brush holder 31 is itself tapped at 4I) to receive a brush 4I which may be of any suitable material, for example, soft wood or soft homogeneous material.

With the above construction it will be clear that when the tool vis inserted within the glass as shown in Figure l, a movement of the lever'M will cause the fingers 29 to expand until the brushes resiliently engage the surface of the bulb, completely rubbing off all of the coating as far as desired without in any manner scratching `the glass. As soon as the coating is re" moved the lever 24 may be manipulated to draw all of the fingers parallel to the shaft to permit the removal of the tool from the bulb.

The form of the invention disclosed in Figure 3 is in general principles identical to that pre-I viously described except that the fingers are adapted to fold back along the shaft rather than to extend outwardly away from it.

In this embodiment, the shaft is hollow and has journaled within it an inner rod 5I. The block 52 corresponding to the block I1 of the previous embodiment is slidably mounted upon the shaft 5I) and pinned to the rod 5I by pin 53 working through a slot 54 in the shaft 59. The bracket 22 on the sleeve 2I and the lever 24 serve to move the block 52 back and forth, as in the previous modification, but in this instanceit is,r

pins 5l so that the collar will rotate with the This collar 5B is provided with a plurality of vcircumferentially spaced radial slots 58 of aY shaft.

length slightly greater than the length of. iingers 59 corresponding to lingers 29 in the previous modification, but these lingers 59 are pivoted at fingers from the body of said lingers, each of 60 at the outer ends of the slots, and lie 'backwardly toward the shaft within the slots. E'ach of the iingers 59 carries a gear segment 6|v which i meshes with.a circumferential rack 62 on the end of the rod 5| and this rack and gear are sadisposed that when the rod 5| is thrust outwardly as far as possible by the spring 55, that the rack will engage the gear segment 6| to withdraw the lingers 59 completely within the slots 58, and in this position the tool may be inserted into and out of the lamp bulb.

When it is desired to expand the lingers, the lever 24 may be manipulated to press the rod 5| inwardly against its spring and thereby through the rack 62 and segment 6| forcing theV lingers 59 outwardly to bring the brushes 4| into resilientengagement with the coating. rThis form of device may be utilized where it is desired to permit the coating'to remain upon the outer portion of the bulb while removing the coating from that portion extending toward the stem.

By the use of these tools a new and improved lamp can be manufactured rapidly without danger of the glass breaking and in such a manner as to cause the finished lamp to presenta neat appearance.

Since certain changes may be made Vin the above construction and different embodiments of the invention could b e made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in the'accompanying drawing shall beinterpreted as illustrative'and not in a limiting sense.

It is also to be understood thatthe following claims are intended to cover al1 of the generic and specific features of the invention herein `described, and Aall statements 'of the scope of the invention which, as a `matter of language, might be said to fall therebetween.

What I claim and desire to secureby Letters Patent is:

1. A device of the character described comprising in combination an elongated drive lmember restrained from axial movement'having slots in its forward end, lingers pivoted within said slots and having extensions lying within said slots extending on rthe opposite side of the pivots of said lingers from the body of said iingers, each .of said iingers having a tip of a soft material,

able member, saidmeans being constructed and arranged to rotate said lingers about their pivots.

2. A device of the character described comprising in combination an elongated drive member restrained from axial movement having slots in its forward end, lingers pivoted within said slots and having extensions lying within said slots extending on the opposite side of the pivots of said said iingers havingl a tip of a soft material, and means including a member movable axially of said drive member for engaging said extensions and a spring associated with said axially movable member, said means being constructed and arranged to` rotate said ngers about their pivots,

and means including a block axially movable with respect to said drive memberand means constraining said block and said drive memberl to move together and a lever connected to said block and arranged to move said endwise movable member.

3. A device of the character described comprising in combination a non-rotatable sleeve` adapted to be inserted in the stem of a lamp bulb, a rotatable member having a `maximum diameter I not substantially greater than the sleeve, and having a portion rotatably disposed therein, and having slots therein, lingers pivoted within said slots having extensions lying within said slots extending on the opposite side of the pivots of said iingers from the body of said iin-` gers, said lingers having a soft tip,'and a member concentric with said rotatable member'constructed and arranged to engage said extensions to move said lingers about their pivots.

4. A device of the character described comprising in combination a non-rotatable sleeve adapted to be inserted in the stem of a' lamp'rbulb, a rotatable member having a maximum diameter not substantially greater than the sleeve and hav- .ing a portion vrotatably disposed therein, and havv tatable member and a lever pivoted to said block and connected to move said concentric member, the latter being constructed and arranged for moving said fingers about their pivots.

' CAESAR J.. BRIVEFER. 

